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United States of America Patent
Stats
-
Aug 3, 1982
Grant Date -
N/A
app pub date -
Oct 16, 1980
filing date -
Oct 16, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sealing ring firmly grips a movable piston, performs the normal sealing function, and when pressure is released on the piston the sealing ring pulls back on the piston so as to retract the piston. The sealing ring is designed so as to fit in a conventional seal or 'O' ring groove without any modification of the groove.
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Cited Art Landscape
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